Moistureproof package



y 1935. s. BERGS TEIN MOISTUREPROOF PACKAGE Filed Nov. 19, 1950INVENTOR. SAMUEL BERGS TE/N.

ATTORNEYS.

Patented July 16, 1935 UNITED STATES PATENT OFFICE 5 Claims.

My invention relates to packages having a covering of transparent andmoisture-proof material such as cellulosic material.

It is an object of my invention to produce cellulosic material tubesfrom continuous webs of material which may be either cut as produced orre-rolled to be out later. Cartons may be enclosed in the tubeduringtheir production, the tube may be cut, and the carton opened within the'tube. The carton may then be filled with merchandise, the ends closed,the transparent moisture-proof cover closed at the ends, and the productmade ready for shipment. I

Tubes of cardboard with one side covered by the transparent cellulosicmaterial may be produced in various lengths or in continuous rolls to becut as needed.

In the art there has been considerable development in the use oftransparent flexible material, such as cellulosicmaterial, which hasoften been employed in very thin sheets to completely enclose cartonsPl'lfl'PfiCkflQ'ES, so that the contents of the package will bepreserved in a moisture-proof condition.

Ordinarily the carton is prepared and the contents of the package areinserted within the carton. The flaps are then closed in and the sheetof cellulosic material or other flexiblematerial is then wrapped aroundthe carton and overlapped and the edges are folded over and sealed toform a closure which makes substantially a moistureproof package. As thesheets of transparent flexible material must, because of the cost, bemade so thin and flimsy, the problem of wrapping the transparentmaterial about the package is one which requires hand labor, and evenwhen carefully done is apt to result in an untidy looking package.

Broadly it is the object of my invention to provide a package in whichthe transparent outer wrapper has been secured in position about thevarton which is folded flat before the carton has been opened out sothat in packing goods into the container, all that is necessary is tosquare the carton, and this automatically squares or opens up thewrapper. The contents of the package may thenbe inserted and the closureflaps folded down, and at the same time or later, the ends of thetransparent wrapper which extend beyond the ends of the carton arefolded over and sealed. Such a combination permits the folding operationof both the closure flaps of the carton or container and the closureflaps oi the moisture-proof wrapper to be accomplished substantially atthe same time.

Such a carton may be made by a method in which the flexible transparentmaterial, such as cellulosic material, is moved along in a web and thepreviously formed cartons are positioned in spaced position on the webso that when the flexible material is formed into a tube and cut inthedesired lengths, all that is necessary is for edges of the flexiblematerial to be overlapped and sealed together, and the container isready for shipment to the user of the package.

Referring to the drawing:

Figure l is plan view of my improved packageforming unit in flatcondition as it comes from the machine which has folded a tube ofcellulosic or like material around the carton and secured the materialin its tubular shape, the carton being without flaps.

Figure 2 is an end view of the same'after it has been set up from itsflattened'condition into rectangular cross-sectional form. Figure 3 is aperspective view of the same after having been set up as shown in Figure2.

Figure 4 is. a plan view similar to Figure 1,

except that the enclosed carton has flaps at both ends.

Figure 5 is an end view of the same after it has been set up intotubular form.

Figure 6 is a perspective view of the same in the set up tubular form ofFigure 5.

As shown in the example of Figs. 1, 2 and 3, the carton, of any suitablecarton stock, is made of rectangular blank scored at I, 2, 3 and I andfolded on the score lines'to form narrow opposite walls 5 and 6, andwider opposite walls 'I and 8. wall 6 by means of a narrow flap formedon the wall 6 by folding at score line 4; this flap la being adhesivelysecured to the edge portion of wall 8. Such tubes may be made at a rapidrate on machines of known construction. Preferably one of the walls, asthe other wide wall I, has an opening through which the contents of thepackage will be visible when the carton has been enclosed in thecellulosic material, which will stretch across this opening 9. Thiscellulosic material is also a tube, which may be formed on a suitablemachine from a long web, which web is folded at H), II, l2 and I3 whenthe carton is set up; the alternate folds II and I3 being formed by themachine, to make of the material a flat tube. The edges of the materialare adhesively joined at ll. The adhesive may be any suitable glue orthe like, or the edge portions of the cellulosic strip-may have beenpreviously made adhesive with a coating of spi it gum, al-

The wide wall 8 is secured to the narrow lowed to dry, and then havingan acetate solution applied to it to soften it, by suitable mechanism inconjunction with the mechanism that. folds the material and brings theedge portions together at I4. This or other adhesive may be used tocause the cellulosic material to adhere to the enclosed carton, eitherat the joint l4 or the machine, are introduced into the folding strip,and bysuitable further folding means and pressure applying means, thecartons may be assembled in the cellulosic strip very rapidly, as wellas accurately. By suitable timed mecha-' nism, the cellulosic strip,after complete folding and securing at I4, is cut to uniform lengths, in

which there are substantialextensions Hi and N5 of the cellulosicmaterial past the ends of the carton. The package-forming unit will thenappear as shown in Fig. 1, ready to be set up as shown in Figs. 2 and 3.

When thus set up, the contents may be inserted from either end of thecarton, throughthe open extensions l5 and it, after which theseextensions may be folded across the open ends of the carton and foldedupon themselves to make a secure closure, either with or withoutadhesive to secure them and seal them.

In the example of Figs. 4, 5 and 6, the difference from the firstexample is that the carton has flaps 5a, 6a, la and 811, respectively,at both ends of its walls 5, G, 1 and 8, as is well known in the art ofmaking cartons. The method of manufacture and assembly of the carton andthe cellulosic covering is the same as that described above for thefirst example. In this case, after the contents are inserted, the flapsof the carton may be closed and sealed, and then the extensions I5a. maybe folded across the closed flaps. It is possible to avoid sealing theflaps, relying upon the folded-across extensions [5a of cellulosicmaterial to effect the needed closure against moisture and the like. Itwill of course be understood that the flaps at one end of the carton maybe closed before the contents are inserted, as is usual in cartonfilling.

What 1' claim as new and desire to seure by Letters Patent is: V

1. As an article of manufacture, a knock-down, moisture and dust proofcarton, comprising an inner structure self sustained in the form of aflattened tubular carton body frictionally' held inside of a tube ofcellulosic material of greater length than the inner carton body in theclosed condition of the article.

2. As an article of manufacture, a knock-down,

'moisture and dust proof container, comprising an inner carton body ofrectangular shape formed from a cut and scored blank and having a gluedflap, said inner body being folded fiat along two of the diagonallyopposite score lines, said inner body being entirely enclosed in, andfrictionally held in place by a tube of cellulosic material which is ofgreater length than the said blank.

3. As an article of manufacture, a knock-down, moisture and dust proofcontainer comprising an inner carton body of rectangular shape formedfrom a cut and scored blank and having a glued flap, said inner bodybeing folded flat along two of the diagonally opposite score lines andhaving an aperture therein, said inner body being entirely enclosed in,and frictionally held in place by a tube of cellulosic material which isof greater length than said blank, the said cellulosic materialcooperating with said aperture to provide a window for the 'visualinspection of the contents.

4. As an article of manufacture, a knock-down, moisture and dust proofcontainer comprising an inner structure self sustained in the form of aflattened tubular carton body having a glued flap, said inner body beingfrictionally held inside a tube of cellulosic material of greater lengththan said carton'body in the closed condition of the article.

5. As an article of manufacture, a knock-down, moisture and dust proofcontainer comprising an .inner carton body, saidbody being formed from acut and scored blank having four parallel longitudinal score lines and aglue flap, said flap serving to hold said carton in tubular form, saidcarton being folded flatwise along two of the diagonally opposite scorelines, said inner body having an aperture in one of its walls and beingenclosed in and frictionally held in place in a tube of cellulosicmaterial which is longer than said inner body, said container adai d tobe erected for use by extending the twojuxtaposed score lines, insertingtherein through an end the merchandise to be packed, the excess lengthof the cellulosic tube serving to make moistureproof seals at the endsof the container.

SAMUEL BERGSTEI N.

